Read Excel file and generate bar graph

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In this tutorial, you will learn how to read an excel file and generate bar
graph.

Read Excel file and generate bar graph

In this tutorial, you will learn how to read an excel file and generate bar
graph. Here is an example that reads an excel file using POI api and store the
data into array list. We have created the array list for each column(depends on
the number of columns) and using the data of excel file, we have generated a bar
chart. The given code uses Apache POI api and Jfreechart api.